Given that I grew up in Northern NY near the Canadian border NH is a temperate climate to me. The only thing I do is put studded snow tires on and sand bags in the bed, but that's because I have a 2WD and I drive to upstate NY and NH a lot. Well, that and 2WD sucks on icey hills, the rest of the time it's fine.
I park in my garage so I don't have to worry if it's cold or snowing out. If I were to park outside I might consider an engine block heater, but that's a big might. Also a lot of people that park outside get those windshield covers that keep the ice and snow off. It saves time in the morning. If you find that you're driving long distances and can't keep warm, something I've never had a problem with, you can get a cover for your grill to let the radiator stay warmer.
You really don't need to do anything different unless you're moving to northern Canada or Alaska IMO.